Cylinder-boring machine



Sept. 30, 2

A. DICKERSON CYLINDER BORING MAcHmE l .0 av e h s S e e h s 2 Filed Jan- 31, 1921 $251,, di'mzM M //v VE/VIOR BY 772, ir-mat A TTORNEY Se t. 30, 1924.

A. DIC KERSON CYLINDER BORING MACHINE File J fl- 31. 1921 2 Sheets-Sheet Patented Sept. 30, 1924.

ARTHUR DICKERSON, OF SALT LAKE CITY, UTAH, ASSIGNOR TO MECHANICAL DE- VELOPMENT COMPANY, OF SALT LAKE CITY, UTAH, A CORPORATION;

GYLINDEEBOlR-ING MACHINE.

Application filed January 31, 1921.

To all whom it may concern:

Be it known that I, ARTHUR DICKERSON,

a citizen of the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Cylinder- Boring Machines, of which the following is a specification.

My invention relates to tools and holders therefor, and has for its object to provide a cutting tool and a holder which is secured on an engine block whereby the cylinders of an internal combustion engine may be quickly and efliciently trued up and bored out without removing the engine from its position on the frame of a road vehicle, such as automobiles, trucks and tractors.

These objects I accomplish with the device illustrated in the accompanying drawings in which similar letters. and numerals of reference indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in the appended claims.

In the drawings, in which I have shown a substantial embodiment of my invention, Figure 1 is a side elevation of the device. Figure 2 is an elevation showing the device in place on the engine of an automobile somewhat reduced in size from the other views. Figure 3 is a longitudinal section of the hollow shaft showing the cutting tools with the adjusting elements therefor in elevation, parts out way. Figure 4 is a view in perspective, somewhat enlarged as to the other figures, of the cutting face of the tool with the other dimensions shown diagrammatically. Figure 5 is an elevation of the cutting tool, showing one corner thereof.

In boring out or in tracing up the cylinders of engines used on automobiles, trucksand tractors it is highly desirable in order to save time, that the work be done without having to remove the engine block from the frame of the vehicle, but one of the difficulties has been to provide a tool holder which may be adjusted and rigidly held in position relative to the cylinder to be worked on, and to provide one which may be operated without using the common bench or machine lathe, as well as to overcomethe other diflioulty of providing a cutting tool which may be adjusted to out just Serial No. 441,206.

the required amount of material to true up the cylinder. A

The present invention overcomes such difficulties and consists of an adjusting standard A, having a central. longitudinal bore and within which is carried the clamp ing bolt B. The said bolt is threaded at each end and provided with nuts screwed thereon, with its lower portion passed through one cylinder. A clamp plate 1 is carried on said bolt B to engage the under side face of the cylinder block C of the engine and is the means used. by me to hold my device rigidly in place while boring out the adjacent cylinder. The lower end portion of said standard A is given a square form, while the main portion of the stand ard is cylindrical, thus throwing out on each lower corner an integral lug 2, which lugs are bored and internally threaded to hold the tap screws 3. Each of said squared portions of said standard is slotted as at lto provide another lug 5 against which the lower end of the ta 3 screw 3 bears, and the material is such that the lug 5 may be slightly sprung to adjust the boring shaft D and direct the cutting tools. Integral bracket arms E and F are also formed on said standard A. The free end of the bracket arm, F is given a collar form as at 6 and acts! as a bearing for and carries the lower end portion of the boring shaft 1). The free end of the bracket arm E is also given a collar form, asat T, and is internally threaded to engage the threads of the said boring shaft D and also act as a bearing for said shaft. Each of said collars 6 and 7 is provided withextended lug portions, and is slitted through said lugportions to the interior of the collar. Bolts with nuts thereon are carried in holes bored in said lug portions 6 ani 7 respectively to take up any wear which may take place by the operation of said boring shaft D. The horing shaft D ishollow and has one portion externally threaded, as at S, to engage the threads in the said collar 7, and is the means used to advance and hold the cutting tool to its work. A crank handle 10 is fastened on the upper end of said holding shaft D to rotate said shaft, while on the lower end of said shaft is secured the tool holder 11. The said tool holder is cylindrical in shape and is diametrically bored or provided with a square opening IQwithin which is carried the special cutting tools 13. A hearing plug let is fastened in the said holding shaft D near and partially within said tool holder 11, and two openings are bored in said bearing plug to carry the lower ends of two tool adjusting rods 15 and 16. Another bearing plug 17 is fastened in the upper end of said holding shaft D, and which plug 17 is also bored and internally threaded to carry the upper ends of said adjusting rods 15 and 16. The upper end portion of each of said rods 15 and 16 is externally threaded to ei'igage the threads of said plug 17, and the extreme end pop tions of said rods 15 and 16 are shaped-to be engaged by a wrench to rotate and'move said rods longitudinally. The lower end of each, of said rods is tapered and given a conical form to engage the angled end of the cutting tool, whereby said tool may be adjusted to its work. I have provided a special cutting tool G, two of which are used in the device, and each consists of a squared rod of steel having one end cut at an angle, as at 18, against which the conical end of one of the rods 15 or 16 bears, while the other end is first given a cylindrically curved form, as shown at 19, and then a convex cut as at 20, cutting away a portion of the form 19, and leaving acutting edge 21 which is curved in two ways and angled in its general direction from opposite corners of the tool, to give the tool a draw cutting effect and prevent its vibration. The tool is backed off in grinding, as shown by the faces 22 and 23. lVith a tool thus formed and constructed it is interchangeable, and may be used to cut when the said shaft is rotated in either direction by turning the tool one-half over; thereby leaving the general direction of the cutting edge 21 on the same angle, that is, from the lower left hand corner to the upper righthand corner and with the convex curve 20 upward when used as right hand and downward when used as left hand.

Theoperation of my device is as follows: The upper face of the engine. block is bared and the device is set over one of the cylinders with the squared end of the standard A restlng on sa1d upper face and the clamp plate 1 engaging the lower end of the same cylinder. The nuts on the rod 13 are turned up to fasten the device rigidly in place and with the holding shaft D in alineinent with one of the cylinders to be bored. lVith the cutting tools in place, one positioned to cut when said shaft is turned toward the right and the other positioned to cut when the shaft D is turned toward the left, the device is operated by turning the shaft D toward the right and by noticing where the tool is cutting it can be readily seen whether the shaft D is in alinement with the cylinder under treatment, and if not, by turning the tap screws 3 this adjustment may be quickly made. Then by rotating: the said shaft D toward the right a cut may be made through said cylinder, and desiring to cut when the shaft D is being raised the right hand cutting tool isreleased by withdrawing its adjusting rod 15 or 1611s the case may be, and turning down. the other of said rods, which is in engagement with" the left hand cutting-tool G. Thiswill allow' the left hand tool to cut its way asthe shaftD is" raised. The-operation ofthe twotools G, one cutting as the shaft descendsand the other cutting as-the'shaft ascends, gives'the rapidity of work desired. l/Vhen one cylinder has been trued up, the device may be fastened through. that cylinder and the adjacent cylinder cutout as above described.

I thus provide anew andnovel standardfor rigidly holding a hollow shaft in al-inement with the cyl nder of an engine and'novel hearing collarswhich will allow the said' hollow shaft to be moved longitudinal-1y.

through them, and within 5 which hollow shaft are new adjusting rods'by which cutting tools are moved radially withinanew and novel tool casing or holder, with anew and-novel too-l specially adapted to be used as a part ofthe device.

Having thus described myfin-vention I' desire to secure by Letters Patent and claim 1. A cylinder boring machine comprismg. a standard having integral bearing arms for aboring bar, lugs projecting from' the lower portion of said standard each having a threadedhole therein; other lugs integral with'said' standard and spaced from the perforated lugs; tap screws "with the threads thereon meshing with the threads in the hole of the first mentioned lugs, whereby the upper of said bearing arms may be adjusted laterally to" direct the said boring bar.

2. A cylinder boring machine comprising a standard having integral bearing arms at each end thereof, and in which arms a boring bar is operated; integral portions of one end of said standard extended as a base; each of said extensions" slitted in transverse direc tion as: to sa1d standard; and tap screws operated through one portlon of each extension lug and seating against the adjacent port-ion of the same lug to; s ring said ad j acent portlon and thereby at just the direction of said boring bar.

In testnnony whereof I have aflixed'my slgnature.

ARTHUR DICKERSON. 

